Transcript
Make-Up Air For Other Exhaust Appliances Per Code Section 9.32.4: Additional Protection Against Depressurization* BC Building Code ERRATUM: Section 9.32.4 Sentence 1 refers to a Sentence 8 exception. However, Sentence 8 has been removed from the Code. The Building Policy Branch has informed us the Sec 9.32.4 requirement for make-up air now applies to solid fuel fired appliances, formerly exempted from this requirement by Sentence 8. House Volume NAFFVA or Radon Present
NAFFVA =Naturally Aspirating Fuel Fired Vented Appliances)
Manually Switched Large Exhaust Appliance Present Greater than 0.5 ACH Installed capacity
Make-Up Air Required
Exhaust Greater than 126 cfm ACTIVE Make-up Air Interconnected supply fan required to deliver Make-Up Air for entire installed capacity.
No NAFFVA or Radon Make-Up Air NOT Required
Less than 0.5 ACH Installed capacity
Make-Up Air NOT Required
Exhaust Less than 126 cfm PASSIVE Make-up Air Make-up air for entire installed exhaust capacity Size per Table 9.32.3.8 Passive Make-Up Air Opening Size
Make-up Air:Note 1 1) Delivered to Unoccupied Area and tempered to at least 34°F, then tempered to 54° F before Passive Delivery to an occupied area, or 2) Delivered to Occupied Area and tempered to at least 54°F.
Note 1: Tempering requirement of this air may in many coastal climate applications unnecessarily increase installation costs with little benefit to the occupants. *9.32.4.2: Carbon Monoxide Alarms. New requirements for CO detectors in all dwellings that contain a fuel burning appliance or a storage garage are also included in this section. Typically electricians will be installing this equipment, but may need contractor input. See Appendix Page 54-A for code wording.
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© 2006 TECA March 07 3rd Edition
Example: Active Make-up Air System Duct HeaterNote 2 Optional locations
‰
‰
Exhaust Air
Notes 4
Make-up Air Duct
Make-up Air
Duct Stat
‰
Make-up Air FanNotes 1 & 5 with interconnect and Duct Heater
Mechanical or Electrical interconnect
Exhaust Air FanNote 3 with Fan Switch, PD (Pressure Differential) Switch , or Current Sensing Switch 1. Select Make-up Air Fan so when installed it will equal the exhaust appliance's actual installed exhaust rate, per 9.32.4.2.(b). Interconnect with supply fan, per 9.32.4.3. See Appendix: Duct Sizing for Larger Fans for make-up air system design considerations. 2. Deliver supply make-up air to an unoccupied area of dwelling and temper to required minimum of 34°F with further tempering to 54°F before passive delivery to occupied area, or deliver directly to occupied area and temper to required minimum of 54°F, per 9.32.4.4.(a) & (b). See Appendix: Duct Heater Sizing 3. Applies to conventional overhead range hoods, down-draft cook tops and any other exhaust appliance (dryer, exhausting vacuum system, etc.) with an installed capacity exceeding 0.5 ACH when make-up air required due to Radon Gas or NAFFVA appliance present). 4. See Appendix: Duct Sizing for Larger Fans to size ducts for Make-up Air Fans. 5. Per BCBC Section 2.5 Equivalents, Sentence 2.5.1.2 (1) states: "Any person desirous of providing an equivalent to satisfy one or more of the requirements of this Code shall submit sufficient evidence to demonstrate that the proposed equivalent will provide the level of performance required by this Code." See Appendix: Depressurization Test for Larger Fans © 2006 TECA March 07 3rd Edition
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A
Mechanical Ventilation Checklist A—Non-Distributed
Use this checklist with Non-Distributed Systems such as those usually found in dwellings with electric or hot water radiant or baseboard heating systems or where duct systems do not distribute ventilation air. Civic Address___________________________________________________ Permit No.__________ A bedroom is a room with an openable window (minimum dimensions apply), a closet and a closing interior door.
(A)
Number of Bedrooms ft3
Total Interior Volume of Dwelling
Total volume includes heated interior joist spaces and heated crawlspaces. Exhaust appliances exceeding .5 ACH may require make-up air.
cfm (B)
.5 ACH (air changes/hr) = Volume x 0.5 ÷ 60 =
1. Principal Fan a) Exhaust Rate: Use the bedroom count from Box (A) above and Table 9.32.3.3.A. to determine Minimum Rate. Maximum Rate of 110 cfm if NAFFVA/Radon present. The Principal Exhaust Fan will be controlled automatically with an interval timer OR run continuously. Minimum required rate: Interval Timer Continuous
cfm
(C)
b) Principal Fan CFM & Sone Rating:
Make_________________ Model_________________ Sones:
(D)
cfm
(E)
Box E Maximum allowed is 110 cfm if Make-up Air Required in Step 4.
Interval ______ Continuous ________
Maximum rating: Interval Timer 1.5 Sones
cfm
Continuous 1 Sone
Fan Location: ________________________________________________________
c) Principal Fan Duct Size: Use actual fan cfm in Box E above and Table 9.32.3.9. Fan Duct size: ________ inches.
Duct type:
___Smooth
2. Required Kitchen and Bathroom Exhaust Fans: Room
Fan Make & Model
___Flex
Fan CFM
Code Req'd Min. actual Fan CFM @.2"W.C. per Table 9.32.3.3.B
@.2"W.C. per Manf. Rating
Duct Diameter (in) Table 9.32.3.9*
Smooth
Flex
* For fan capacities exceeding Table 9.32.3.9, follow manufacturer's installation instructions or use good engineering practice to size duct. See Ventilation Guidelines Appendix page 24-A. Checklist
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A1
© 2006 TECA March 07 3rd Edition
3. NAFFVA (Naturally Aspirated Fuel Fired Vented Appliance) and/or Radon Gas present in dwelling unit? No, Omit Steps 4 to 7. Yes, Proceed to Step 4 & 5 4. Passive Make-Up Air Duct for Principal Fan: Use the Box E installed cfm and Table 9.32.3.8. Make-up air duct diameter______inches.
Location ____________________________________
5. Exhaust Appliance present which exceeds Box B 0.5 ACH: No such appliance. Omit Steps 6 to 7. Yes, Proceed to Step 6. 6. Use Passive Make-up Air for Exhaust Appliance with actual installed exhaust rate of 126 cfm or less: Appliance Cfm _________
Passive Make-up Air Duct Sized to Table 9.32.3.8: _______inches
7. Use Active Make-up Air for Exhaust Appliance with actual installed exhaust rate of more than 126 cfm.
Make-up Air Fan required: *Exhaust Appliance Cfm _________ Fan Make ___________________ Model ________________ Fan Cfm __________ *Must equal actual installed exhaust rate of appliance. Duct diameter ________inches Fan Location ___________________________ Fan ducted to ________________________________
A) Active Make-up Air delivered to an Unoccupied Area (not directly to room containing the appliance).
Tempering Required per 9.32.4.1.(4)(a): Show calculation & describe how make-up air will be tempered to at least 34°F (1°C) before entering unoccupied area.
_______________________________________________________________________________________ Transfer Grill Required: Size to Table 9.32.3.8 (or 1 sq in of gross area per 2 cfm):
Transfer grill size __________ sq. in. Location ________________________________________ Additional Tempering Required per 9.32.4.1.(4)(b) before transfer to occupied area: Show calculation and describe how make-up air will be further tempered to at least 54°F (12°C).
______________________________________________________________________________________ B) Active Make-up Air delivered to an Occupied Area: Tempering Required. Show calculation and describe how make-up air will be tempered to at least 54°F (12°C).
________________________________________________________________________________ ________________________________________________________________________________
Installer Certification: Date __________________ I hereby certify that the design and installation of the ventilation system complies with the 2006 B.C. Building Code. Print Name______________________________________________
2006 TECA Ventilation Certification Stamp
Signature_________________________________________________ Company_______________________________________________ Phone __________________________
Checklist A2 © 2006 TECA March 07 3rd Edition
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B
Mechanical Ventilation Checklist B—Distributed Previously Checklist C (per former 1998 BCBC)
This Checklist is for use with forced air heating systems where the heating duct system distributes ventilation air.
Civic Address___________________________________________________ Permit No.__________ Number of Bedrooms
(A)
Total Interior Volume of Dwelling
Total volume includes heated interior joist spaces and heated crawlspaces.
ft3
.5 ACH (air changes/hr) = Volume x 0.5 ÷ 60 =
cfm
A bedroom is a room with an openable window (minimum dimensions apply), a closet and a closing interior door.
(B)
Exhaust appliances exceeding .5 ACH may require make-up air.
1. Principal Fan a) Exhaust Rate: Use the bedroom count from Box (A) above and Table 9.32.3.3.A. to determine Minimum Rate. (Maximum Rate of 110 cfm if NAFFVA/Radon present.) Minimum required rate: Interval Timer Continuous cfm
(C)
cfm
b) Principal Fan CFM & Sone Rating: Make_________________ Model_________________ Sones: Interval ______
Maximum allowed: Interval timer 1.5 sones
(D)
cfm (E) Box E Maximum allowed is 110 cfm if Make-up Air Required in Step 4.
Continuous _____
Continuous 1 sone
Fan Location: ________________________________________________________ c) Principal Fan Duct Size: Use actual fan cfm in Box E above and Table 9.32.3.9 for Duct. Fan Duct size: ________ inches.
Duct type:___Smooth___Flex
2. Required Kitchen and Bathroom Exhaust Fans: Room
Fan Make & Model
Fan CFM
Code Req'd Min. actual Fan CFM @.2"W.C. per Table 9.32.3.3.B
@.2"W.C. per Manf. Rating
Duct Diameter (in) Table 9.32.3.9*
Smooth
Flex
* For fan capacities exceeding Table 9.32.3.9, follow manufacturer's installation instructions or use good engineering practice to size duct. See Ventilation Guidelines Appendix page 24-A.
Checklist B1
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3. NAFFVA (Naturally Aspirated Fuel Fired Vented Appliance) and/or Radon Gas present in dwelling unit? No, Omit Steps 4 to 7. Yes, Proceed to Step 4 & 5 4. Active Make-Up Air Duct for Principal Fan: Per Sec 9.32.3.8. (2) (b) (ii & iii) Install a 4"Ø outdoor
air duct into the furnace return air plenum not more than 15ft (unless a flow control device is used) or less than 10ft from the furnace cabinet. In locations with winter design temperature less than –10° C, this duct must have a motorized damper interconnected with principal ventilation air fan. Interconnect in place: Prinicipal Fan & Furnace Blower Yes
Damper make ___________________ Voltage________
& Damper (if present)
Yes
5. Exhaust Appliance present which exceeds Box B 0.5 ACH: Yes, Proceed to Step 6. No such appliance. Omit Steps 6 to 7. 6. Use Passive Make-up Air for Exhaust Appliance with actual installed exhaust rate of 126 cfm or less: Appliance Cfm _________
Passive Make-up Air Duct Sized to Table 9.32.3.8: _______inches
7. Use Active Make-up Air for Exhaust Appliance with actual installed exhaust rate of more than 126 cfm.
Make-up Air Fan required: *Exhaust Appliance Cfm _________ Fan Make ___________________ Model ________________ Fan Cfm __________ *must equal actual installed exhaust rate of appliance. Duct diameter ________inches Fan Location ___________________________ Fan ducted to ________________________________
a) Active Make-up Air delivered to an Unoccupied Area (not directly to room containing the appliance). i) Tempering Required per 9.32.4.1.(4)(a):
Show calculation & describe how make-up air will be tempered to at least 34°F (1°C) before entering unoccupied area.
_______________________________________________________________________________________ ii) Transfer Grill Required: Size to Table 9.32.3.8 (or 1 sq in of gross area per 2 cfm): Transfer grill size __________ sq. in.
Location ________________________________________
iii) Additional Tempering Required per 9.32.4.1.(4)(b) before transfer to occupied area: Show calculation and describe how make-up air will be further tempered to at least 54°F (12°C).
______________________________________________________________________________________ OR b) Active Make-up Air delivered to an Occupied Area: Tempering Required. Show calculation and describe how make-up air will be tempered to at least 54°F (12°C).
________________________________________________________________________________ ________________________________________________________________________________ Installer Certification: Date __________________ I hereby certify that the design and installation of the ventilation system complies with the 2006 B.C. Building Code. Print Name______________________________________________
2006 TECA Ventilation Certification Stamp
Signature_________________________________________________ Company_______________________________________________ Phone __________________________
Checklist B2 © 2006 TECA March 07 3rd Edition
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C
Mechanical Ventilation Checklist C—Distributed or Non-Distributed
Use this checklist when a centrally ducted exhaust ventilation systems such as an HRV (heat recovery ventilator or a CEV (central exhaust ventilator ) is used to meet principal fan requirements. Civic Address___________________________________________________ Permit No.__________ (A)
Number of Bedrooms Total Interior Volume of Dwelling
ft3
.5 ACH (air changes/hr) = Volume x 0.5 ÷ 60 =
cfm
A bedroom is a room with an openable window (minimum dimensions apply), a closet and a closing interior door. Total volume includes heated interior joist spaces and heated crawlspaces.
(B)
Exhaust appliances exceeding .5 ACH may require make-up air.
1. Use the bedroom count from Box (A) above and Table 9.32.3.3.A. to determine the minimum Principal Exhaust Rate provided by the system. Minimum Required Rate: cfm (C) 2. HRV or CEV Equipment: Make_____________________________ Model __________________ 3A. HRV Capacity: CFM @.4"W.C. Box D must meet Box C Minimum Requirement. 3B. CEV Capacity: CFM @.4"W.C. Box E must meet Box C Minimum Requirement. a) The fan must be controlled either with an interval timer or run continuously:
Continuous Operation
Intermittent Operation
cfm
(D)
cfm
(E)
cfm
(F)
b) The Principal Fan Rate may be set lower than its full Box E Capacity if installation is in a NAFFVA home where the principal fan cfm rate must not exceed 110 cfm per 9.32.3.3.(2). If this applies, indicate fan cfm setting in Box F. Box F must meet Box C Minimum Requirement.
4. Required Kitchen and Bathroom Exhaust: ROOM
EXHAUST RATE Required per Table 9.32.3.3.B
EXHAUST EQUIPMENT Additional WALL/CEILING FANS Make & Model
[email protected]" *Duct Dia (in) Manf. Rated smooth flex
HRV/CEV Exhaust CFM
TOTAL
* Use Table 9.32.3.9. For fan capacities exceeding Table 9.32.3.9, follow manufacturer's installation (BOX D OR E) instructions or use good engineering practice to size duct. See Ventilation Guidelines Appendix pg 24-A.
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Checklist C1
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5. NAFFVA (Naturally Aspirated Fuel Fired Vented Appliance) and/or Radon Gas present in dwelling unit? No, Omit Steps 6 to 9. Yes, Proceed to Step 6 if CEV or Step 7 if HRV. 6. CEV only—Make-Up Air Duct for Principal Fan: Choose (a) or (b) and proceed to Step 7.
a) Non-Distributed system—Passive make-up air duct: Use Box E or F installed cfm and Table 9.32.3.8. Make-up air duct diameter______inches.
Location ____________________________________
b) Distributed system—Active Make-Up Air Duct for Principal Fan: Per Sec 9.32.3.8. (2) (b) (ii & iii) Install a 4"Ø outdoor air duct into the furnace return air plenum not more than 15ft (unless a flow control device is used) or less than 10ft from the furnace cabinet. In locations with winter design temperature less than –10° C, this duct must have a motorized damper interconnected with principal ventilation air fan.
Interconnect in place: Prinicipal Fan & Furnace Blower Damper make ___________________ Voltage________ & Damper (if present)
Yes Yes
7. Exhaust Appliance present which exceeds Box B —0.5 ACH: Yes, Proceed to Step 8. No such appliance. Omit Steps 8 to 9.
8. Use Passive Make-up Air for Exhaust Appliance with actual installed exhaust rate of 126 cfm or less: Appliance Cfm _________
Passive Make-up Air Duct Sized to Table 9.32.3.8: _______inches
9. Use Active Make-up Air for Exhaust Appliance with actual installed exhaust rate of more than 126 cfm.
Make-up Air Fan required: *Exhaust Appliance Cfm _________ Fan Make ___________________ Model ________________ Fan Cfm __________ *must equal actual installed exhaust rate of appliance. Duct diameter ________inches Fan Location ___________________________ Fan ducted to ________________________________
a) Active Make-up Air delivered to an Unoccupied Area (not directly to room containing the appliance). i) Tempering Required per 9.32.4.1.(4)(a):
Show calculation & describe how make-up air will be tempered to at least 34°F (1°C) before entering unoccupied area.
_______________________________________________________________________________________ ii) Transfer Grill Required: Size to Table 9.32.3.8 (or 1 sq in of gross area per 2 cfm): Transfer grill size __________ sq. in. Location ________________________________________ iii) Additional Tempering Required per 9.32.4.1.(4)(b) before transfer to occupied area: Show calculation and describe how make-up air will be further tempered to at least 54°F (12°C).
______________________________________________________________________________________ OR b) Active Make-up Air delivered to an Occupied Area: Tempering Required. Show calculation and describe how make-up air will be tempered to at least 54°F (12°C).
Installer Certification:
Date __________________ I hereby certify that the design and installation of the ventilation system complies with the 2006 B.C. Building Code. Print Name______________________________________________
2006 TECA Ventilation Certification Stamp
Signature_________________________________________________ Company_______________________________________________ Phone __________________________
Checklist C2 © 2006 TECA March 07 3rd Edition
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